Missing mscorlib

I'm getting this error when building moonlight on opensuse 10.3 x86_64 

http://mono.ximian.com/monobuild/builds/HEAD/suse-103-x86_64/moon/115461/logs/build.log

Making all in test-runner
make[4]: Entering directory `/tmp/monobuild/build/BUILD/moon-115461/test/harness/test-runner'
gmcs -debug+ -unsafe -r:System.Drawing.dll -r:Mono.Posix.dll -r:System.Data.dll -r:Npgsql.dll
-pkg:ndesk-dbus-1.0 /resource:./html_template.html /resource:./comparison_report.html
/resource:./regression_report.txt /out:test-runner.exe Agviewer.cs DbusServices.cs
IDbusService.cs Driver.cs ExternalProcess.cs Test.cs TestBeginEventHandler.cs
TestCompleteEventHandler.cs TestCompleteReason.cs TestResult.cs TestRun.cs TestRunner.cs
HtmlTest.cs XamlTest.cs LoggingServer.cs Screensaver.cs ImageCompare.cs EdgeCompare.cs
IReport.cs VerboseLevel.cs ComparisonReport.cs ConsoleReport.cs HtmlReport.cs XmlReport.cs
DbReport.cs ../../../tools/Options.cs ExocortexDSP/src/AssemblyInfo.cs
ExocortexDSP/src/Complex.cs ExocortexDSP/src/ComplexMath.cs
ExocortexDSP/src/FourierDirection.cs ExocortexDSP/src/Complex
 Array.cs ExocortexDSP/src/ComplexF.cs ExocortexDSP/src/ComplexStats.cs
ExocortexDSP/src/Fourier.cs 
The assembly mscorlib.dll was not found or could not be loaded.
It should have been installed in the `/usr/lib64/mono/2.0/mscorlib.dll' directory.
make[4]: *** [test-runner.exe] Error 1

I noticed that the mono def file changed 'default' to 'net_1_1'. What do i need to change in the build to get
this to work?
Thanks for the help.

Rusty